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Imagine that construction crews have set up a pair of blinking lights 60m apart to make a construction zone along a road. a car moves along the road with a speed of 30m/s toward the lights. let us t
Two positive point charges, each 17 , lie along the -x axis at x = -0.15 and x = +0.15 . Find the electric field at the point (0, 0.25 ) on the -axis. Express your answers using two significant figu
A concave mirror forms an inverted image four times larger than the object. Find the focal length of the mirror assuming that the distance between object and image is 0.600m.
Water vapor consists of nonlinear polyatomic molecules, so all three rotational modes are excited at ordinary temperatures. What is the thermal kinetic energy of 8.0 mole(s) of water vapor at 193C?
The gas at the center of the Sun is 38.0% hydrogen (H) and 62.0% helium (He) by composition at temperature of 1.50X10^7 K and a density of 1.48X10^5 kg/m^3. What is the pressure?
What will be the volume of the oxygen if it is allowed to expand slowly to normal atmospheric pressure, at room temperature?
The fundamental frequency of that string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency?
Four protons are placed at the corners of a square of side length a = 1.0 angstrom. The square is in the +x, +y quadrant of the xy plane with one corner at the origin. Find the electric field magnit
(a) If the player comes to rest at third base, how much work was done on the player by friction? (b) What was the coefficient of kinetic friction between the player and the ground?
Find the magnetic force on the electron when the earth's field has a horizontal component of 0.250 G and dips 60.0° below the horizontal (values typical in California).
The primary coil of a certain transformer has an inductance of 3.75 H and a resistance of 36.2 olms. If the primary coil is connected to an ac source with a frquency of 38.6 Hz and a voltage of 71.
An infinitely wide and an infinitely thin insulating plane has a uniform surface charge density of 3.5 nC/m^2. What are the strength and direction of the electric field at:
The x-component of a velocity vector that has an angle of 32 degrees to the +x-axis has a magnitude of 6.0 m/s. what is the magnitude of the velocity? what is the magnitude of the y-component of th
A capacitor is to be made of two parallel plates of gold, separated by a sheet of plastic. The plastic sheet is 1 mm thick, and its dielectric constant is 2. The capacitance of the parallel-plate ca
If the coefficient of static friction between the box and the plank is 0.29, what is the maximum amount the spring can be stretched and the box remain at rest?
A step up transformer is connected to a generator that is delivering 141 V and 110 A. The ratio of the turns on the secondary to the turns on the primary is 1150 to 4. What current flows in the seco
Find the tension in each of the two ropes supporting a hammock if the first one is at an angle of 20.9° above the horizontal and the second is at an angle of 35.2° above the horizontal.
A grating with 396 lines/mm is illuminated with light of wavelength 343 nm. What is the angular separation between the two m = 2 bright spots? A) 7.79° C) 23.6° E) 32.9° B) 15.8° D)
A telescope consists of a mirror with radius of curvature 4.4 m and an eyepiece. If an astronomer would like the telescope to have a magnification of 186, what focal length eyepiece should he use?
Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with
You swing a 3.16-kg bucket of water in a vertical circle of radius 0.860 m. At the top of the circle the speed of the bucket is 3.20 m/s; at the bottom of the circle its speed is 7.00 m/s. Find the
The grating is illuminated with a beam of white light containing the 400 nm to 700 nm wavelength range. The angular width of the gap between the first order spectrum and the second order spectrum is
For two slits, the third-order maximum for 400nm light occurs in the same spot as the second-order maximum for which other visible wavelength?
A string, 0.260 m long, vibrating in the m = 6 harmonic, excites an open pipe, 0.880 m long, into its third resonant frequency. The common frequency of the string and the pipe is closest to: